Tools that scan text and estimate how likely it was written by an AI model. Used by educators, publishers, and SEO teams.
Educator-first detector with the lowest false-positive rate in independent tests.
GPTZero rose to prominence as the detector schools reached for first. It scores documents at the sentence level, so you can see exactly which lines tripped the model rather than ju...
The publisher's choice, strongest on paraphrased and edited AI text.
Originality.ai is built for the content pipeline rather than the classroom. It pairs AI detection with plagiarism checking and a full-site scanner, so agencies managing many domain...
Document, image, and OCR detection in one reporting-focused tool.
Winston AI markets itself to professionals who need defensible reports. Beyond text it can scan uploaded PDFs, Word files, and even images for AI generation, a capability few detec...
The multilingual specialist, covering 30+ languages.
Copyleaks differentiates on language reach. While most English-only detectors weaken on non-English text, Copyleaks holds quality across more than 30 languages and layers plagiaris...
The most-searched free detector, no signup required.
ZeroGPT is the casual first stop: paste text, get a percentage in seconds, no account needed. It has grown to tens of millions of monthly users, making it the most searched name in...
The institution power, already inside most university LMS systems.
Turnitin did not set out to be an AI detector, but because schools already pay for its plagiarism platform, its AI indicator arrived inside the workflow they already use. No new to...
API-first detector for fast per-sentence checks inside business tools.
Sapling AI targets teams that want detection embedded in their own stack rather than a standalone site. Its detector returns per-sentence scores through an API, which makes it a fi...
A completely free, no-signup detector aimed at students.
Scribbr's detector is positioned squarely at students who need a trustworthy check before submission and do not want to pay. It is free, requires no account, and explains its flags...
Bulk scanning across 100+ languages for premium users.
Crossplag started in the academic integrity space and leans into volume. The free tier handles quick checks, while premium plans unlock unlimited word scanning and support for more...
SEO-context detector built into a content pipeline.
Content at Scale approaches detection from the publisher's chair. Its AI detector is free to use and arrives alongside a larger content-creation and optimization suite, so SEO team...
AI Detectors
AI detection is no longer a novelty. In 2026 it sits inside classrooms, newsrooms, and content pipelines, and the tools behind it range from free no-signup chec...
AI Detectors
Two names come up whenever publishers compare detectors: Winston AI and Originality.ai. Both target professionals rather than casual users, but they are built f...
AI Detectors
Students use detectors for two opposite reasons: to check their own work before submission, and to understand why a draft might get flagged. The right tool is f...
AI Detectors
Educators face a practical choice: a dedicated detector like GPTZero, or the Turnitin system already embedded in their LMS. Both catch AI writing, but they diff...